I'd just be honest to a point about it. "I have some doubts myself and feel like a fraud telling others about things i'm not sure of myself",
if pressed on the doubts, just fob them off that you are trying to resolve them yourself and dont need any help with it thanks...
Having doubts isnt a crime, spreading them around to others IS (to them). There is a big difference in dub land between those two.
every situation is different as it depends on how gung ho your elders are.